On 2022/3/2 AM 11:29，“David Ahern”<dsahern@xxxxxxxxx> write: >On 3/1/22 7:50 PM, Jakub Kicinski wrote: >> On Sat, 26 Feb 2022 00:49:29 -0800 Dongli Zhang wrote: >>> + SKB_DROP_REASON_SKB_PULL, /* failed to pull sk_buff data */ >>> + SKB_DROP_REASON_SKB_TRIM, /* failed to trim sk_buff data */ >> [...] >>> SKB_DROP_REASON_DEV_HDR, /* there is something wrong with >>> * device driver specific header >>> */ >>> + SKB_DROP_REASON_DEV_READY, /* device is not ready */ >> >> What is ready? link is not up? peer not connected? can we expand? > >As I recall in this case it is the tfile for a tun device disappeared - >ie., a race condition. This seems is that tun is not attached to a file (the tun device file is not opened?) Maybe TAP_UNATTACHED is more suitable :)
